From the record
“The Mount Sterling Commercial Historic District is a historic business district located in downtown Mount Sterling, Illinois. The district, located immediately south of the Brown County Courthouse, includes four entire city blocks and parts of four others; 38 buildings, of which 35 are contributing buildings, are in the district.”
Wikipedia article Mount Sterling Commercial Historic District, CC BY-SA 4.0.
One of 2 National Register listings published here for Brown County · listed in 1987 · category: District.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service